Tuna鮪魚
Signature ingredient: Vitamin B12 — A-grade evidence (B12 Deficiency Anemia, ~417% of the studied dose per serving)
Standard nutrients per USDA FoodData Central · phytochemicals (lutein / K2 / sulforaphane etc.) are literature estimates, varying by variety and processing
S / A … ingredient evidence tier (tap for the claim) | bar = how much of the studied dose one serving of Tuna gives you
Meaningful intake one serving delivers a real fraction of the studied dose
Vitamin B12
10ug · 417% DV · Excellent source
A B12 Deficiency Anemia →
＋ Pernicious Anemia A・Neuropathy B
≈ 417% of studied dose
Omega-3 / Fish Oil
300mg · Moderate (lower in canned)
C Cardiovascular Disease Disputed →
＋ Arthritis B・Cholesterol B
≈ 30% of studied dose
Trace contribution far below the studied dose — not a therapeutic source
Vitamin D
80iu · 10% DV · Sunlight synthesis also possible
B Osteoporosis →
＋ Pregnancy A・Immune Function B
≈ 8% of studied dose
Why this page doesn't claim "Tuna works"
Whole foods almost never have RCTs — the evidence sits on the ingredients. So this page does one honest thing: it lists which graded ingredients Tuna contains, how much, and how far that is from the studied dose. It makes no efficacy claim about Tuna itself.
Bottom line: Tuna is a good source of selenium and vitamin B12, with moderate omega-3. But large tuna accumulate methylmercury - pregnant women and young children should limit how often they eat it, which is the biggest difference from salmon.
Every tier links to its full evidence page · Methodology →